Class A underlayment assembly order for a ZIP deck & metal roof

Hi,Looking for a straightforward way to do a ZIP roof deck and metal roof to meet Class A in wildfire country, when I’m guessing I’m going to want underlayment better… Hi,Looking for a straightforward way to do a ZIP roof deck and metal roof to meet Class A in wildfire country, when I’m guessing I’m going to want underlayment better…Read MoreGreenBuildingAdvisor